/**
 * JUnit test for invoice test
 */

package source;

import static org.junit.Assert.*;
//import java.util.*;

import org.junit.Test;


public class InvoiceTest extends Invoice {
	public String x = "";
	
@Test	
public void testAddToBill(){
	BillTest bill = new BillTest();
	addToBill(bill);
	x = "";
}
	@Test
	public void testDisplay() {
		
		assertEquals(x, display());
	}

}
